Preparation method of PVDF-HFP/GO composite film for increasing content of beta crystalline phase

A technology of PVDF-HFP and composite films, which is applied in the preparation of PVDF-HFP/GO composite films and PVDF-HFP composite films, can solve the problems of poor piezoelectric properties of PVDF-HFP composite films and achieve β crystal phase content Effects of increasing and improving piezoelectric properties and improving crystallinity

Active Publication Date: 2018-04-24
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in order to solve the defect that PVDF-HFP composite thin film piezoelectric property is poor because the content of β phase in the composite thin film is less in the prior art, provide a kind of PVDF-HFP / Preparation method of GO composite film

Method used

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  • Preparation method of PVDF-HFP/GO composite film for increasing content of beta crystalline phase
  • Preparation method of PVDF-HFP/GO composite film for increasing content of beta crystalline phase
  • Preparation method of PVDF-HFP/GO composite film for increasing content of beta crystalline phase

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preparation example Construction

[0033] A method for preparing a PVDF-HFP / GO composite film for increasing the content of the β crystal phase, comprising the following steps:

[0034] Step S1, polishing and cleaning the flat glass.

[0035] In order to improve the cleaning effect on the flat glass, in step S1, the cleaning step of the flat glass is: cleaning the polished flat glass with detergent to remove surface stains; then using ultra-clean water to remove residual detergent and Stains; put the cleaned flat glass into analytically pure acetone and ultrasonically clean it for 15-20 minutes; use ultra-clean water to remove acetone on the surface and then add absolute ethanol to ultrasonically clean it for 15-20 minutes to remove residual acetone; use the flat glass after ethanol Ultrasonic cleaning with ultra-clean water for 15-20 minutes, followed by drying with N2.

[0036] Step S2, mixing and stirring graphene oxide particles with a mass percentage of 0.01% to 0.1% with a solvent to prepare a graphene oxi...

Embodiment 1

[0046] A method for preparing a PVDF-HFP / GO composite film for increasing the content of the β crystal phase, comprising the following steps:

[0047] Step S1, polishing and cleaning the flat glass;

[0048] Step S2, mixing and stirring graphene oxide particles with a solvent to make a graphene oxide dispersion; then adding PVDF-HFP to the suspension to mix and stir to obtain a PVDF-HFP / Graphene oxide mixed solution; When ene particles are added to the solvent, the mass percentage of graphene oxide particles is 0.01% to 0.1%; when PVDF-HFP spherical particles are added to the graphene oxide dispersion, the mass percentage of PVDF-HFP spherical particles is 25%. ~30%;

[0049] Step S3, defoaming the PVDF-HFP / Graphene oxide mixed solution prepared in step S2 in a 0.1Mpa to 0.01Mpa vacuum box for 3 to 4 hours;

[0050] Step S4, pour the PVDF-HFP / Graphene oxide mixed solution degassed in step S3 on the flat glass after step S1 cleaning, and spread the PVDF-HFP / Graphene oxide mix...

Embodiment 2

[0053] On the basis of Embodiment 1, in order to improve the cleaning effect on the flat glass, in step S1, the cleaning step of the flat glass is: cleaning the polished flat glass with detergent to remove surface stains; then using ultra-clean water Remove residual detergent and stains on the surface; put the cleaned flat glass into acetone analytically pure and ultrasonically clean it for 15-20 minutes; use ultra-clean water to remove acetone on the surface, then add absolute ethanol and ultrasonically clean it for 15-20 minutes to remove residual acetone; The flat glass after ethanol was ultrasonically cleaned with ultra-clean water for 15-20 min, and then dried with N2.

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Abstract

The invention discloses a preparation method of a PVDF-HFP / GO composite film for increasing a content of beta crystalline phase, and particular relates to a preparation method of a composite film forincreasing the content of beta crystalline phase in a PVDF-HFP / Graphene oxide composite film, and aims at providing a method for increasing the content of beta crystalline phase of a PVDF-HFP piezoelectric composite film, which solves the problem that the single PVDF-HFP composite film is low in crystallization degree and low in content of the beta crystalline phase. The PVDF-HFP / Graphene oxide composite film is prepared from a piezoelectric material PVDF-HFP and a graphene oxide material by virtue of a scraping process. The method is simple and convenient in film formation and low in cost. The preparation method comprises the following steps: cleaning flat glass; preparing a PVDF-HFP piezoelectric material and graphen oxide material mixed precursor solution; vacuum defoaming; and growingthe piezoelectric composite film on a flat glass substrate by virtue of the scraping process; and stretching and polarizing the piezoelectric composite film.

Description

technical field [0001] The invention belongs to the field of pyroelectric composite film materials, and relates to a method for preparing a PVDF-HFP composite film, in particular to a method for preparing a PVDF-HFP / GO composite film for increasing the content of β crystal phase. Background technique [0002] PVDF is a new type of organic polymer sensing material, which has obvious piezoelectric effect after processing. Compared with piezoelectric ceramics and piezoelectric crystal materials, although its piezoelectric coefficient is relatively low, its electroacoustic response frequency curve is smooth, and its signal-to-noise ratio is high. It is easy to make a large-area flexible composite film, with high dielectric strength and mechanical The advantages of excellent performance and good chemical stability make it the most ideal sensory material. In addition, the PVDF composite film is soft and light, and has a great shape similar to human skin; the flexible PVDF sensor ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L27/16C08K3/04
CPCC08J5/18C08J2327/16C08K3/04
Inventor 太惠玲叶学亮袁震蒋亚东谢光忠杜晓松
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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